Remote Asymmetric Oxa-Diels–Alder Reaction of 5-Allylic Furfurals via Dearomatizative Tetraenamine Catalysis
摘要:
A previously unreported activation mode is developed through the generation of dearomatizative tetraenamine species between 5-allylic furfurals and a bifunctional amine-thiourea catalyst. The very remote zeta,eta-alkenes perform as effective HOMO-raised dienophiles in inverse-electron demand oxa-Diels-Alder cycloadditions with isatin-derived oxadiene substrates, delivering multifunctional spirocyclic oxindoles incorporating a dihydropyran skeleton in moderate to high yields with good to excellent enantio- and diastereoselectivity.
Compounds comprising
or a pharmaceutically acceptable salt or a prodrug thereof, are disclosed, wherein Y, A, B, and J are as described.
Methods, compositions, and medicaments related thereto are also disclosed.
A compound comprising
or a pharmaceutically acceptable salt, prodrug, or a metabolite thereof is disclosed herein. Y, A, and B are as described herein. Methods, compositions, and medicaments related to these compounds are also disclosed.